It is one of the holiest relics of Christianity – the cup from which Jesus drank at the last supper and in which Joseph of Arimathea collected the blood of the saviour as he was crucified. Journey from the Holy land to the museums of Europe in search of the Holy Grail. Ancient legends say the relic was transported to Britain and passed down among the descendants of Joseph. But could the grail remain hidden somewhere in England? Experts explore the tangled web of stories surrounding the Grail in search of clues to its existence and purported powers. Is it possible that the Grail is a pathway to a higher power or that the descendants of Jesus walk among us today, protected by the Grail's power? Trace the incredible history and extraordinary tales of power, superstition, magic and mystery that surround one of Christianity's most sought-after relics.